David Vlahov (born August 31, 1952)[1] is an American epidemiologist and professor emeritus at the UCSF School of Nursing, of which he previously served as dean from April 2011 to August 2016. He is also the editor-in-chief of the Journal of Urban Health, and has been a member of the National Academy of Medicine since 2011.[2][3] He is known for researching issues related to social determinants of health, such as the effectiveness of needle exchange programs.[4][5] With Sandro Galea, he has also researched psychological responses to the September 11 attacks among residents of New York City.[6][7]